2020年11月2日
[CF149D] Coloring Brackets（区间dp）
摘要： 原题 Once Petya read a problem about a bracket sequence. He gave it much thought but didn't find a solution. Today you will face it. You are given strin 阅读全文
posted @ 2020-11-02 08:20 kurum! 阅读(67) 评论(0) 推荐(0) 编辑